Let E = {, x, y, z} where P denotes a blank, so x x, P, and x xy but xy

Let E = {ß, x, y, z} where P denotes a blank, so xß x, ß ß ≠ P, and xß ≠ xy but xλy = xy. Compute each of the following:
(a) ||λ||
(b) || λ λ ||
(c) ||ß||
(d) ||ß ß ||
(e) || ß3 ||
(f) ||xßßy||
(g) ||ßλ||
(h) ||λ10||